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• Sending e-mail on behalf of our customer(s), with Postfix

  - by NathanE

  We send e-mail on behalf of our customers, via our own SMTP services. It's always been a problem for us because usually our "spoofing" of their source address results in the mails being caught in spam traps. This hasn't been a problem in the past due to the small volume and low importance of these mails that we sent. However this requirement has recently changed and we need to fix this issue. We realise that fundamentally our application is sending e-mail incorrectly, as per this post: Send email on behalf of clients However, we would like to resolve the problem at the SMTP server level. We have deployed a server running Postfix. Is it possible to have Postfix automatically adjust the mail headers so that we get this "Sent on behalf of" behaviour? I figure it should just be a case of Postfix noticing that the FROM address is the spoofed (i.e. a domain that is not mentioned in its config anywhere) and therefore inject/replace the appropriate headers to get the desired effect. Thanks.

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• postfix revived and delivered have the same values (?)

  - by thinkingbig

  I have configured my first server (Debian with ISPConfig). Generally i want to send bulk e-mails to our users, i configure postfix and turn on postfix... but... After 1 hour of sending emails i have logs like this: Grand Totals messages 21886 received 21883 delivered 0 forwarded 0 deferred 234 bounced 0 rejected (0%) 0 reject warnings 0 held 0 discarded (0%) 30805k bytes received 31280k bytes delivered 3 senders 3 sending hosts/domains 12588 recipients 3 recipient hosts/domains Per-Hour Traffic Summary time received delivered deferred bounced rejected -------------------------------------------------------------------- 0000-0100 0 0 0 0 0 0100-0200 0 0 0 0 0 0200-0300 0 0 0 0 0 0300-0400 0 0 0 0 0 0400-0500 0 0 0 0 0 0500-0600 0 0 0 0 0 0600-0700 0 0 0 0 0 0700-0800 0 0 0 0 0 0800-0900 0 0 0 0 0 0900-1000 0 0 0 0 0 1000-1100 0 0 0 0 0 1100-1200 0 0 0 0 0 1200-1300 0 0 0 0 0 1300-1400 0 0 0 0 0 1400-1500 0 0 0 0 0 1500-1600 15311 15306 0 168 0 1600-1700 6575 6577 0 66 0 1700-1800 0 0 0 0 0 1800-1900 0 0 0 0 0 1900-2000 0 0 0 0 0 2000-2100 0 0 0 0 0 2100-2200 0 0 0 0 0 2200-2300 0 0 0 0 0 2300-2400 0 0 0 0 0 Host/Domain Summary: Message Delivery sent cnt bytes defers avg dly max dly host/domain 21521 30353k 0 3.4 m 15.5 m wp.pl 355 919k 0 54.9 s 13.0 m mysenderdomainexample.pl 7 8477 0 1.7 s 1.9 s prokonto.pl Host/Domain Summary: Messages Received msg cnt bytes host/domain 21879 30786k mysenderdomainexample.pl 5 16196 mx4.wp.pl 1 3200 mx3.wp.pl Senders by message count 21783 [email protected] 96 [email protected] 6 from=< **So, my question is: 1) Why i have recived and delivered have the same values (approx)? 2) How can I check if an email has been delivered? 3) How to change default "root" and "www-data" user (FROM / RETURN PATH) to another? I have changed this in script, but postfix ignore scripting values and send every mail from root (we have .php send cron's in /etc/crontab) 4) WHY APPROX 100 % MAILS RECIVED HAS BEEN ADRESED TO MY SENDER HOST? Host/Domain Summary: Messages Received Waiting for respond, Regards TB**

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• postfix email gateway

  - by k-h

  I am setting up a postfix email gateway. It will not hold any mail but will accept email for my domain and forward it to another internal mailserver and relay mail out from the internal server. One of the main problems is that I am working on a live running system and this will be an upgrade so I am using a test domain which I will change at some point to the real domain. I tried various methods but found the simplest way (that worked) was to use a script to create an aliases file (from ldap entries). There are various problems with this method. The main one being that the entries can't be of the simple form [email protected] because the gateway doesn't know where to send them. They have to be of the form: [email protected]. What I would like doesn't seem hard but I can't get my head around the postfix documentation. There seem to be various ways but none of them seem to work. Most of the examples I have found on the web assume the mail is going to end up on the server. I want a list of users somewhere, preferably of the form: user1, user2, etc rather than [email protected] (I can easily generate this list) and I would like postfix to forward all email to example.com to a particular server: ie realmailserver.example.com. Can anyone suggest clues as to how I might do this?

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• Postfix not delivering from external senders and not logging anything

  - by simendsjo

  Some semi-recent upgrades must have broken my postfix+dovecot configuration, but I'm having problems finding out what the cause is. My domain is simendsjo.me with the MX record mail.simendsjo.me. I can send mail to both local and external recipients, and it delivers mail from internal mailboxes. The problem is that mail from external senders isn't delivered, and nothing is logged at all. The external sender also doesn't receive any errors. I have no idea where to ever start looking as nothing is logged at all when external mail is sent to my server. So the first issue would be: How can I turn on some debug messages for postfix? I've tried: debug_peer_level = 2 debug_peer_list = simendsjo.me .. And _level = 999 and _list = gmail.com where I'm trying to send emails from. but nothing is logged. When sending mails from a local mailbox (but from an outside computer, not localhost), a lot is logged. I don't have any rules in iptables either. Any ideas how I can get some debug messages for postfix?

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• Host to set up postfix to use external smtp server

  - by Leo

  I have a web server and a mail server. Both have the same domain name except, one points to mywebsite.com and the other is mail.mywebsite.com. They have different IPs. I'm trying to set up postfix on my web server so it uses my mail server as the server that sends e-mails. I followed this guide: http://www.howtoforge.com/postfix_relaying_through_another_mailserver I am getting this error in my logs: Oct 28 02:56:45 mywebsite postfix/smtp[1660]: warning: host mail.mywebsite.com[xxx.xxx.xx.xx]:25 greeted me with my own hostname mywebsite.com Oct 28 02:56:46 mywebsite postfix/smtp[1660]: warning: host mail.mywebsite.com[xxx.xxx.xx.xx]:25 replied to HELO/EHLO with my own hostname mywebsite.com I've searched around and I read that you can't use the same hostname when relaying to a separate smtp server. Is there a work around for this? Do I need to set up my mail server with a separate domain name? Also I have my MX records set up for both mywebsite.com and mail.mywebsite.com. I'm not that experienced with this so if I need to give more info let me know. Thanks!

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• Securing smtp with login

  - by Paul Peelen

  I have a ispconfig server, and it seems that someone is using it to send spam. I got about 130 "Mail Delivery System" email about declined send email. This spammer uses my email address as sent from adress, so I get all these email adresses to my mail. I am using Postfix and Courier. I installed my server according to this guide: http://www.howtoforge.com/perfect-server-debian-lenny-ispconfig3-p3 I did this a few months ago. My question: Can I secure my server to require login to be able to send email, and if so... how? Thanks! EDIT Some data from mail.log, these kind of error show up constantly: Jun 15 17:58:16 bolt postfix/qmgr[10712]: CC7DA1242AE: from=<paul@*****.se>, size=3782, nrcpt=1 (queue active) Jun 15 17:58:16 bolt postfix/smtp[11337]: CC7DA1242AE: to=<[email protected]>, relay=none, delay=4641, delays=4640/0.01/0.32/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=cmlisboa.pt type=MX: Host not found, try again) Jun 15 17:58:19 bolt postfix/smtpd[10836]: connect from static-200-105-220-154.acelerate.net[200.105.220.154] Jun 15 17:58:20 bolt postfix/smtpd[10836]: NOQUEUE: reject: RCPT from static-200-105-220-154.acelerate.net[200.105.220.154]: 550 5.1.1 <advertising@*****.com>: Recipient address rejected: User unknown in virtual mailbox table; from=<[email protected]> to=<advertising@*****.com> proto=ESMTP helo=<static-200-105-220-154.acelerate.net> Jun 15 17:58:20 bolt postfix/smtpd[10836]: lost connection after DATA (0 bytes) from static-200-105-220-154.acelerate.net[200.105.220.154] Jun 15 17:58:20 bolt postfix/smtpd[10836]: disconnect from static-200-105-220-154.acelerate.net[200.105.220.154] Jun 15 17:58:29 bolt postfix/smtpd[10834]: connect from unknown[62.176.172.226] Jun 15 17:58:32 bolt postfix/smtpd[10834]: 386791241F9: client=unknown[62.176.172.226] Jun 15 17:58:34 bolt postfix/cleanup[10975]: 386791241F9: message-id=<[email protected]> Jun 15 17:58:34 bolt postfix/qmgr[10712]: 386791241F9: from=<[email protected]>, size=867, nrcpt=1 (queue active) Jun 15 17:58:35 bolt postfix/smtpd[10834]: disconnect from unknown[62.176.172.226] Jun 15 17:58:35 bolt amavis[11084]: (11084-17) Blocked SPAM, [62.176.172.226] [62.176.172.226] <[email protected]> -> <*****@*****>, Message-ID: <[email protected]>, mail_id: XczovKoMBYNr, Hits: 18.471, size: 867, 833 ms Jun 15 17:58:35 bolt postfix/smtp[10732]: 386791241F9: to=<*****@*****>, relay=127.0.0.1[127.0.0.1]:10024, delay=3.5, delays=2.7/0/0/0.83, dsn=2.7.0, status=sent (250 2.7.0 Ok, discarded, id=11084-17 - SPAM) Jun 15 17:58:35 bolt postfix/qmgr[10712]: 386791241F9: removed Jun 15 17:58:43 bolt postfix/smtpd[10836]: warning: 178.121.154.194: address not listed for hostname mm-194-154-121-178.dynamic.pppoe.mgts.by Jun 15 17:58:43 bolt postfix/smtpd[10836]: connect from unknown[178.121.154.194] Jun 15 17:58:45 bolt postfix/smtpd[10727]: connect from unknown[180.134.223.86] EDIT #2 Got some more info from the logs, this is a send request: mail.info.1:Jun 15 16:41:57 bolt amavis[5399]: (05399-06) Passed CLEAN, [110.139.48.64] [110.139.48.64] <paul@*****.se> -> <[email protected]>, Message-ID: <CHILKAT-MID-7c54ebcf-5501-de9b-f0b1-4f0234290d8d@HP-IRISH>, mail_id: 35l56Ramx6Nc, Hits: -2.941, size: 3329, queued_as: 2485770086, 136 ms mail.info.1:Jun 15 16:41:57 bolt postfix/smtp[4743]: 375C570082: to=<[email protected]>, relay=127.0.0.1[127.0.0.1]:10024, delay=4.8, delays=4.7/0/0/0.14, dsn=2.0.0, status=sent (250 2.0.0 Ok, id=05399-06, from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as 2485770086) Which apparently got thrue. Any ideas how to restrict this?

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• how Postfix anti spam configuration works with DNS-based Blackhole List providers

  - by Ashish

  Hello, I have setup a Postfix mail server for incoming mails that is required to never reply to external enviornment i.e it will accept all incoming mails and never reply anything that can be used as a trace to locate and verify it's existence. I have implemented the Postfix anti-UCE configuration by using the following settings in postfix main.cf for countering spam generating mail servers: 'smtpd_recipient_restrictions = reject_rbl_client zen.spamhaus.org, reject_rbl_client bl.spamcop.net' Now i have certain doubts/questions: How Postfix is able to communicate with Black hole list providers i.e How this whole process works?, e.g here they are zen.spamhaus.org, bl.spamcop.net, so that i can test the performance of whole process. Can a header be added in the received mail regarding the status of the results of the above verification process, since i will not reply any traces from my incoming mail receiving Postfix server, so i need this feature? Please post relevant links for reference. Thanks in advance!!! Ashish

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• Handling bounced email when using a postfix smarthost

  - by Mark Rose

  I'm running a high availability cluster, and so far, most things work great. I have two external machines that act as outgoing mail hosts (smarthosts). The internal hosts are configured to relay all email through these two external facing hosts. My smarthosts' main.cf looks like this: myhostname = lb1.example.com alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases mydestination = lb1.example.com, localhost relayhost = mynetworks = 127.0.0.0/8 10.1.248.0/24 My internal hosts' main.cf looks like this: mynetworks = 127.0.0.0/8 myhostname = web1.example.com mydestination = $myhostname, localhost.$mydomain, localhost relayhost = [10.1.248.3] smtp_fallback_relay = [10.1.248.2] lb1's internal IP is 10.1.248.2, and lb2's internal IP is 10.1.248.3. On the external hosts, email for root and www-data is forwarded to [email protected] with /etc/aliases. One advantage to using the smarthost setup is that spam filters and the like can connect back to the sending sending server. All email is sent fine, and headers look like this: Received: from lb2.example.com ([198.51.100.3]) by mx.google.com with ESMTP id y17si1571259icb.76.2011.01.13.18.20.32; Thu, 13 Jan 2011 18:20:32 -0800 (PST) Received-SPF: neutral (google.com: 198.51.100.3 is neither permitted nor denied by best guess record for domain of [email protected]) client-ip=198.51.100.3; Received: from db1.example.com (unknown [10.1.248.20]) by lb2.example.com (Postfix) with ESMTP id D364823C0BE for <[email protected]>; Thu, 13 Jan 2011 21:20:31 -0500 (EST) Received: by db1.example.com (Postfix) id C9FA7760D6A; Thu, 13 Jan 2011 21:20:31 -0500 (EST) Delivered-To: www-data@localhost Received: by db1.example.com (Postfix, from userid 0) id C1632760D6C; Thu, 13 Jan 2011 21:20:31 -0500 (EST) The problem is bounced/reject email. The external machine tries to forward the email back to the internal machine, e.g. www-data on web1 sending an email that bounces (such as a user signing up with a bad email address). An additional complication is using Google mail for the main example.com domain. In lieu of specifying every internal host in the external hosts' mydestination, is there a better way of setting things up, keeping in mind I can't adjust touch the mx for example.com?

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• Postfix, limit destination concurrency

  - by Hamlet

  Hi, Website sending email using phpmailer - Centos, postfix, php, mysql etc Emails are getting delivered to all hosts correctly except one. Mar 30 14:38:22 server postfix/qmgr[15467]: 7237D218852D: to=, relay=none, delay=0.04, delays=0.04/0.01/0/0, dsn=4.4.2, status=deferred (delivery temporarily suspended: lost connection with mail06.indamail.hu[91.83.45.46] while sending MAIL FROM) They told me to limit concurrent connections to 2 to their server. I did, but they still say I connect more than twice. main.cf: default_destination_concurrency_limit = 1 fallback_relay = smtp_destination_concurrency_limit = 1 initial_destination_concurrency = 1 Any ideas? Thanks, Hamlet

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• Postfix relay with Exchange Server

  - by Parsa

  Is it possible (or even logical) to use Postfix as relay MTA with Microsoft Exchange Server 2007, and if so how?

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• Configure Postfix to send emails "via" a server [migrated]

  - by Zach Russell

  This is a question related to postfix and WordPress (but is more of a postfix question). To give some background, on a professional WordPress host (like WP Engine) when I receive WordPress Mail Notifications (comments, form submissions, new users, etc...) it will say in gmail sent from "predefined wordpress admin email" via email.wpengine.com. This is not blocked by Google's spam filters or anything. I have a cloud server set up and a WordPress site installed on it. When I send email from [email protected] it gets sent to spam and when I send email as [email protected] (me) it fails to send completely. This does, however send fine on WordPress. This goal of this it so send all emails via mail.wptemple.com and have them not get caught by spam filters. How can I accomplish this?

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• Postfix Not Sending Email to Some Addresses?

  - by Jake

  I'm using Jetpack on Wordpress, and it wasn't working. I was getting the following error: Diagnostic-Code: X-Postfix; unknown user: "jake" --60FD1138CAD.1354039466/example.com Content-Description: Undelivered Message (example.com substituted for our domain) We set up a test mail function, and that wasn't sending either. We changed the email to an outside email and it worked. Any thoughts why it won't send to an email that is at the same domain? Or why it sends to some emails but not others? Upon running postconf -n, I get the following: alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases append_dot_mydomain = no biff = no config_directory = /etc/postfix inet_interfaces = all inet_protocols = all mailbox_size_limit = 0 mydestination = example.com, Example, localhost.localdomain, localhost myhostname = example.com mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 myorigin = /etc/mailname readme_directory = no recipient_delimiter = + relayhost = smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtpd_use_tls = yes

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• How do I get a hold of the Reply-To header and remunge it in postfix

  - by Mikhail

  I have a legacy application that emails via php. 5% of the emails aren't going through. The solution is to route all email through a fancy verified mail server like Amazon's SES. I am having some trouble implementing this functionality. It seems this guy had a similar problem. My question is where in postfix can I set a filter that will take as input the the message headers, so that I can manually set the From field and the Reply-To field to [email protected] and [email protected], respectively. Where whatever_php_wants is dictated by the php program and the users registration email. I know where to set the noreply portion, but I don't know the exact place in postfix's configuration files where I can intercept complete emails and pass them to a script. Edit So I want emails to look like: FROM: [email protected] REPLY-TO: the_users_address@their_email_service.com

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• Postfix/Procmail mailing list software

  - by Jason Antman

  I'm looking for suggestions on mailing list software to use on an existing server running Postfix/Procmail. Something relatively simple. requirements: 1 list, < 50 subscribers list members dumped in a certain file by a script (being pulled from LDAP or MySQL on another box) Handles MIME, images, etc. Moderation features No subscription/unsubscription - just goes by the file or database. Mailman is far too heavy-weight, and doesn't seem to play (easily) with Postfix/Procmail. I'm currently using a PHP script that just receives mail as a user, reads a list of members from a serialized array (file dumped on box via cron on the machine with the MySQL database containing members) and re-mails it to everyone. Unfortunately, we now need moderation capabilities, and I don't quite feel like adding that to the PHP script if there's already something out there that does it. Thanks for any tips. -Jason

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• Forcing the from address when postfix relays over smtp

  - by John Whitlock

  I'm trying to get email reports from our AWS EC2 instances. We're using Exchange Online (part of Microsoft Online Services). I've setup a user account specifically for SMTP relaying, and I've setup Postfix to meet all the requirements to relay messages through this server. However, Exchange Online's SMTP server will reject messages unless the From address exactly matches the authentication address (the error message is 550 5.7.1 Client does not have permissions to send as this sender). With careful configuration, I can setup my services to send as this user. But I'm not a huge fan of being careful - I'd rather have postfix force the issue. Is there a way to do this?

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• Mail Server using Postfix

  - by unknown (google)

  I have currently set up my web application on Amazon EC2 server. As a well known fact sending email from EC2 has a problem. As a cheap and long lasting solution instead of using "authsmtp" is it possible to rent a server and use it as a Mail Server? I am currently looking for cheap hosting which will give me root access so that it can be configured and used as a relayhost. I am curently using Postfix as MTA. Has any one implemented this before? I am curious about its feasibility of this solution. I guess common requirements are: Dedicated IP which is not black listed Open relay( open to my Server only) Any Tips for Header configurations to keep the mails out of spam folder. This is like exactly cloning authsmtp for personal use. Any suggestions for other Mail Server software instead of Postfix?

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• postfix destination concurrency

  - by Hamlet

  Hi, I have a website sending email using phpmailer - Centos, postfix, php, mysql etc Emails are getting delivered to all hosts correctly except one. Mar 30 14:38:22 server postfix/qmgr[15467]: 7237D218852D: to=, relay=none, delay=0.04, delays=0.04/0.01/0/0, dsn=4.4.2, status=deferred (delivery temporarily suspended: lost connection with mail06.indamail.hu[91.83.45.46] while sending MAIL FROM) They told me to limit concurrent connections to 2 to their server. I did, but they still say I connect more than twice. main.cf: default_destination_concurrency_limit = 1 fallback_relay = smtp_destination_concurrency_limit = 1 initial_destination_concurrency = 1 Any ideas? Thanks, Hamlet

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• How to change location of Maildir/ in postfix mail system

  - by adesh

  I'm using Postfix with imap and pop servers running on ubuntu linux. I want to change the the location of Maildir folder from user's home directory to some other shared folder so that all mail is in one place. I also have problem sending local mails to users who does not have a home directory (e.g. www-data), the system users created by default. I'm getting the following error. postfix/local[32123]: DCE1D221BBD: to=<www-data@********>, orig_to=<www-data>, relay=local, delay=33, delays=33/0/0/0.12, dsn=5.2.0, status=bounced (maildir delivery failed: create maildir file /var/www/Maildir/tmp/1382169296.P32123.********: Permission denied) I'd like to have a folder structure similar to this: /all-mail/<user-name>/<mail-goes-here>

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• Postfix sendmail -f configuration

  - by William

  I have Postfix installed on two servers. One of them writes e-mail (satellite) and the other one delivers the e-mails (smarthost). When I write e-mail from the satellite server I'm using the sendmail command. My problem is that when e-mail arrives the Return-Path is set to the user@hostname where user is the user that is running sendmail and hostname is the servers hostname. If I use the parameter -f with sendmail I change that, but I'm hoping there is a way to do it in a configuration file for Postfix. Is this possible or should I just deal with having to configure all my software to add the -f argument? Thanks in advanced.

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• Postfix smtp error 450 (failed to add recipient)

  - by culter

  I have debian server with postfix and roundcube. After an attack we are on 2 blacklists, but I don't think that this is the main problem. I can't send mail to any address. I tried to find the cause...I checked var/spool/postfix/etc/resolv.conf and resolv.etc and they're the same with this content: nameserver 127.0.0.1 nameserver localhost In var/log/mail.err I found: cyrus/imap[25452]: DBERROR: opening /var/lib/cyrus/user/m/[email protected]: cyrusdb error cyrus/imap[25452]: DBERROR: skiplist recovery /var/lib/cyrus/user/m/[email protected]: ADD at 1FC0 exists When I try to send email from roundcube, I get the message from title. When I send it within opera or any other mail client, It gives nothing, but email is'nt sended. Thank you for any advice.

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• How to send local mail via postfix to another server

  - by scotts

  I have postfix set up for use as an STMP server to send mail for my domain, but I receive email for the domain via gmail/google apps. The reason I use my own postfix is because I send out a lot of transactional emails to my customers using a web app, and the volume would exceed what google allows with its SMTP servers. Everything works fine, except cron & system mail gets routed to local users on the server, not to the appropriate accounts at google mail. How can I route this system mail to the respective google mail accounts instead?

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• Delivering from Postfix to Exchange

  - by Van Gale

  I have someone with two domains, a.com and b.com. a.com is running a postfix server on the mx host for the domain and I have total control of the server. b.com is running an exchange server on the mx host for the domain and I do not have any control of this server. They have been using b.com as their primary mail address and use the exchange calender with outlook. They want all the same functionality but want to start using a.com as primary mail address. I opened up postfix to allow relay from the ip address of the exchange server and hopefully that's enough from the outgoing side. For delivery though what can I do to forward all incoming emails to the exchange server? I have some aliases defined in /etc/aliases that should take higher priority.

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• Address Rewriting and Masquerading postfix

  - by Shalini Tripathi

  This is header of mail that i have received from mailchimp: Return-Path: bounce-mc.us2_6034522.1358370-achal.tomar58=gmail.com@mail76.us2.mcsv.net> Received: from mail76.us2.mcsv.net (mail76.us2.mcsv.net. [173.231.139.76]) by mx.google.com with ESMTP id er6si2501863qab.62.2012.06.03.05.09.29; Sun, 03 Jun 2012 05:09:29 -0700 (PDT) My query is how they add the received from header to the Return-Path dyanamically,i also want to implement the same in my mail server,i have tried address masquereading in postfix but it was not of much help may be i am misssing something. My mail server has postfix as an MTA and i have centOs 5 as an OS.

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• postfix header_checks

  - by Shalini Tripathi

  This is my mail log file on my local RHEL5 system:- From [email protected] Mon Jun 4 02:04:23 2012 Return-Path: [email protected] X-Original-To: c Delivered-To: [email protected] Received: by www.achal.com (Postfix, from userid 0) id 9C6C356014; Mon, 4 Jun 2012 02:04:23 -0700 (PDT) To: [email protected] Subject: d Message-Id: <[email protected]> Date: Mon, 4 Jun 2012 02:04:23 -0700 (PDT) From: [email protected] (achal) I want to change Return-Path: to [email protected], I have tried header_ checks in postfix but i am not able to get the proper format.Can anybody tell me how to do this.

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• Postfix count relayed messages per user

  - by Martino Dino

  I would like to know if it's possible to count the outgoing (relayed) messages on a per user basis in postfix. I'm managing a small commercial SMTP relay and decided that it would be nice to have a detailed daily report on how much mail a single user have sent (and eventually enforce some limits) possibly in realtime. I've looked almost everywhere and started to think that writing my own milter would be the way to go... Are you aware of anything that already exists for postfix that can count and report relayed mail for authenticated users (a script, milter or whatever)?

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